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An effectiveness-NTU model of a packed bed PCM thermal storage system

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  • Amin, N.A.M.
  • Belusko, M.
  • Bruno, F.

Abstract

This paper presents a mathematical model of a thermal energy storage (TES) system filled with phase change material (PCM) encapsulated in spheres. Using the ε-NTU method, a suitable two dimensional representation was developed capable of predicting the heat transfer during phase change. Previous research using this method in other configurations has assumed one dimensional phase change, which is not applicable to packed bed PCM systems. To determine the NTU, an appropriate definition of the thermal resistance between the heat transfer fluid and PCM is required. To account for the varying phase change process, the thermal resistance was defined in terms of isothermal and parallel path heat transfer. Comparison of model data to experiment has revealed that the phase change within a PCM tank tends to occur simultaneously as defined by parallel heat transfer. A suitable correlation was developed, demonstrating the validity of the ε-NTU method for packed bed PCM systems.

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  • Amin, N.A.M. & Belusko, M. & Bruno, F., 2014. "An effectiveness-NTU model of a packed bed PCM thermal storage system," Applied Energy, Elsevier, vol. 134(C), pages 356-362.
    • Handle: RePEc:eee:appene:v:134:y:2014:i:c:p:356-362
    DOI: 10.1016/j.apenergy.2014.08.020
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    References listed on IDEAS

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    Cited by:

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    4. Shao, Y.L. & Soh, K.Y. & Wan, Y.D. & Kumja, M. & Khin, Z. & Islam, M.R. & Chua, K.J., 2020. "Simulation and experimental study of thermal storage systems for district cooling system under commercial operating conditions," Energy, Elsevier, vol. 203(C).
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    6. de Gracia, Alvaro & Cabeza, Luisa F., 2017. "Numerical simulation of a PCM packed bed system: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 69(C), pages 1055-1063.
    7. Zhao, Bing-chen & Cheng, Mao-song & Liu, Chang & Dai, Zhi-min, 2016. "Thermal performance and cost analysis of a multi-layered solid-PCM thermocline thermal energy storage for CSP tower plants," Applied Energy, Elsevier, vol. 178(C), pages 784-799.
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    9. Soh, Alex & Huang, Zhifeng & Shao, Yunlin & Islam, M.R. & Chua, K.J., 2023. "On the study of a thermal system for continuous cold energy harvesting and supply from LNG regasification," Energy, Elsevier, vol. 275(C).
    10. Wang, Wei & Shuai, Yong & Qiu, Jun & He, Xibo & Hou, Yicheng, 2022. "Effect of steady-state and unstable-state inlet boundary on the thermal performance of packed-bed latent heat storage system integrated with concentrating solar collectors," Renewable Energy, Elsevier, vol. 183(C), pages 251-266.

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